login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A205610 Number of 3X(n+1) 0..3 arrays with every 2X2 subblock having the same number of equal edges as its horizontal neighbors and a different number from its vertical neighbors, and new values 0..3 introduced in row major order 1
110, 1030, 9688, 95564, 946066, 9502090, 96151010, 982430426, 10112195016, 104859909328, 1094042468862, 11478802373122, 121006212428726, 1280887123146782, 13605620542741848, 144946618170994884 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A205609

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 17*a(n-1) +31*a(n-2) -1380*a(n-3) +24*a(n-4) +37716*a(n-5) +28069*a(n-6) -327857*a(n-7) -359875*a(n-8) +1111408*a(n-9) +1460528*a(n-10) -1281648*a(n-11) -2003792*a(n-12) +11264*a(n-13) +365568*a(n-14)

EXAMPLE

Some solutions for n=4

..0..1..2..0..3....0..0..0..0..1....0..1..1..0..0....0..0..0..1..1

..3..0..1..2..1....0..1..1..0..0....0..0..1..0..1....0..1..1..1..2

..2..2..1..0..0....3..3..2..2..3....1..2..1..2..1....2..2..3..0..0

CROSSREFS

Sequence in context: A284348 A234760 A234753 * A159484 A283219 A283137

Adjacent sequences:  A205607 A205608 A205609 * A205611 A205612 A205613

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 29 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 25 16:01 EST 2022. Contains 350572 sequences. (Running on oeis4.)